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Old 05-23-2012, 11:00 PM   #1
1970ChevyChamp
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12 bolt rearend, 6 lug to 5 lug

I have a 6 lug 12 bolt truck rearend with 4:11 gears in my truck now. I am wanting to convert over to 5 lug. I have a couple spare 12 bolt rearends with 5 lug axles in them. Can I just pull the axles out of the 5 lug parts rearend and put them into the rearend that originally had the 6 lug in it? If so or if not what do I need to do? Thanks
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Old 05-23-2012, 11:18 PM   #2
kaycee
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Re: 12 bolt rearend, 6 lug to 5 lug

For the most part yes you can,they changed the rear end width mid 70's sometime.Measure the width from face of drum to other face of drum and see if the width is the same,if so then they will swap over.I had a narrow rear and used wider axle's,I made a 3/4" spacer to go in between the backing plate and axle housing. the rears are 1 1/2" differance between the 2 ,been running it hat way for 5 yrs and no problem.
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Old 05-24-2012, 12:04 AM   #3
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Re: 12 bolt rearend, 6 lug to 5 lug

Alright thanks! I knew there was some kind of catch to doing it.
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Old 05-24-2012, 12:56 AM   #4
leddzepp
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Re: 12 bolt rearend, 6 lug to 5 lug

If your truck's rear end is a 1970, there is a good chance that it has the wider housing, and 5 lug axles would pop right in with no problem.
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Old 05-24-2012, 02:42 AM   #5
1970ChevyChamp
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Re: 12 bolt rearend, 6 lug to 5 lug

Quote:
Originally Posted by leddzepp View Post
If your truck's rear end is a 1970, there is a good chance that it has the wider housing, and 5 lug axles would pop right in with no problem.
It is actually in a '67 pickup, but I am pretty sure that one of the extra 12 bolts I have is out of a '69 if I'm not mistaken. Oh well, I guess I'll have to let the tape measure do the talkin!
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Old 06-10-2012, 08:32 PM   #6
1970ChevyChamp
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Re: 12 bolt rearend, 6 lug to 5 lug

What I have is the shorter '67 12 bolt and my extra parts rearends are the newer style longer housings. What should I do to convert to five lug? I would prefer to stick with the shorter housing so I can fit bigger tires, or should I just out one of the newer style housings under there?
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Old 06-10-2012, 09:20 PM   #7
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Re: 12 bolt rearend, 6 lug to 5 lug

If you have access to a mill I am pretty sure you can redrill your axles to 5 lug
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Old 06-10-2012, 09:32 PM   #8
3rdGen.c10
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Re: 12 bolt rearend, 6 lug to 5 lug

you can buy the five lug conversion axles online. summit has moser 5 lugs for those rearends. thats what i did and theyre sweet. or cpp has conversion kits with everything you will need.
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Old 06-10-2012, 09:32 PM   #9
lolife99
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Re: 12 bolt rearend, 6 lug to 5 lug

Aftermarket 5-lug axles is your answer.
Moser Engineering or Early Classic Enterprises can fix you up.
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Old 06-10-2012, 10:25 PM   #10
mbgmike
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Re: 12 bolt rearend, 6 lug to 5 lug

we sell the axles. We also shorten and respline axles, housings, build pro stock rear ends from scratch ,redrill and plug etc. Just for info.
I think we are 90 to redrill and 50 to plug and pair of axles
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